The spotted giant flying squirrel, also known as the lesser giant flying squirrel, is a species of rodent in the family Sciuridae. It is found in hill and mountain forests at altitudes of 200–4,000 m
A grey-headed giant flying squirrel (P. e. caniceps) above, but incorrectly showing the upperparts and tail as almost the same colour as the head (a gliding Bhutan giant flying squirrel below)
Callosciurus prevosti
Otospermophilus Variegatus Grand Canyon
Patagium
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The patagium is a membranous body part that assists an animal in obtaining lift when gliding or flying. The structure is found in extant and extinct groups of flying and gliding animals including bats
Wing of a desert red bat (Lasiurus frantzii)
A flying dragon, Draco spilonotus, extending the gular flag (throat flap) and patagia